Wetherspoon has reportedly sold 500,000 vegan burgers since launching the option last October.
The stat was revealed by the pub chain's head of food, Jameson Robinson, and published by online outlet i.
The chain previously used a plant-based patty from Meatless Farm. Earlier this week, it replaced the burger with Beyond Meat's patty, which now available all 874 of its UK locations.
According to i, Robinson believes the switch will increase vegan burger sales even further. He has described it as ' a great new option for vegans and vegetarians, as well as anyone wishing to reduce their meat intake, which is an ever-growing number'.
The Beyond Burger is served with chopped lettuce and sliced tomatoes in a sourdough bun (£6) - or customers upgrade to a 'gourmet' version with red onion, salsa, avocado, and rocket (£7.50). This makes the vegan option pricier than the beef burger, which retails at £5.
Speaking about the launch of the Beyond Burger, Beyond Meat's Regional Marketing Director Bram Meije said: "We're on a mission to help more people eat more of the foods they love while enjoying the benefits of plant-based protein.
"We're excited to secure our biggest listing to date and to introduce Wetherspoon customers to the delicious taste and texture of the Beyond Burger."